VOLVO
CEM-1A5E - Communication with the steering wheel angle sensor module (SAS). Signal missing
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Hva betyr feilkoden?
The central electronic module (CEM) has lost the link to the steering wheel angle sensor (SAS) and sets this code. The fault lies in the communication, not in the CEM, so the CEM should not be replaced. The SAS sits inside the steering wheel module and measures the angle that the stability system uses, so without its signal the stability function does not work.
Mulige årsaker
- The SAS is not getting power
- The ground wire to the SAS is broken
- Contact resistance in the connections
- Broken CAN wiring to the SAS
- Wrong SAS for this car, for example a used module with different software or hardware
- No power or ground reaching the steering wheel module, since the SAS is supplied from it
Hva du kan gjøre
- 1With the ignition on, the DSTC lamp in the climate control button row should light.
- 2Check the SAS fuse. If it has blown, replace it once. If it blows again, use a multimeter to check the wire after it has no contact with ground.
- 3Check that the connector to the steering wheel module is seated and not corroded. Use a multimeter to check that its ground wire has no break
- 4With a diagnostic tool, watch the steering angle in live data; it should change evenly lock to lock. Do not work on the steering wheel module yourself
- 5After the work, DSTC is not activated until the car has reached a certain speed, so road-test the car afterwards
Symptomer du kan merke4
- The anti-spin lamp is lit (model year 2002 and earlier)
- The general yellow warning lamp is lit (model year 2003 and later)
- The stability function does not work
- A message appears in the display
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